Adhesive tape or plaster



Jan. 23, 1934. F. l. BENNETT, JR 1,944,834

ADHESIVE TAPE ORZPLYTER v Filed Jan. 16, 1952 'Nun-4,

(-Xttorneg l Patented Jan. 23, 1934 UNITEDl STATES -PATENT, OFFICE 1,944,834 ADHESIVE TAPE on PLAs'TEn' Application January 16, 1932. Serial No. 587,119

1 Claim. y(Cl. 154-43) The invention is particularly addressed to tapes or plasters which employ a normally plastic or tacky adhesive such as the rubber base adhesive mass of the conventional so-called surgical tape or plaster.

Objects of the invention are to provide a paper tape or plaster of novel structural and functioning characteristics and a method whereby it can be made more expeditiously and more economically than the conventional tape or plaster whether of cloth orpaper.

Under ordinary practice, adhesive tape or plaster is made by spreading a tacky mass or adhesive on cloth or paper by means of a knife or by calendering. Calendering is expensive and little resort is had to it when the backing material is paper, Which presents series difficulties to calendering, especially when relatively thin paper of low tensile strength is used. Knife or doctor blade spreading has its disadvantages because it is rnot conducive to uniform and symmetrical sage.

According to the present invention calendering is not necessary andthe disadvantages of the knife yspreading method are obviated.

The nature of the invention consists in spreading paper, cellophane, or other unified sheet material, with a normally plastic or tacky adhesive mass, without regard to the manner of spreading and without resort to gaging as heretofore practiced; in the superimposing upon the adhesive spread surface of a perforated sheet or web of paper, or the like, the omce of which is to providefor substantial masking of the spread surface while at the same time providing for controlled exposure of active mass of adhesive through the agency of the perforations; the ultimate product being a multi-ply tape or plaster of 'great tensile strength, of uniform gage, and which can be stacked in sheet form or rolled upon itself without the use of intervening facing fabric and without danger of promiscuous sticking. 1

The preferred method and product are illustrated in the accompanying drawing, forming a part hereof, wherein Figure 1 is a face view of the active side of the novel tape or plaster. v

Fig. 2 is a similar view with portions of the elements eaced more clearly to show the relative structure.

Fig. 3 is a section on line 3-3 of Fig. 1.

Fig. 4 is a diagrammatic illustration of the man- 1 ner of applying the facing ply.

rial, such as paper, cellophane, or more expensive material as occasion may warrant, is provided with a surface spread or coating, as at 6, of normally plastic or tacky adhesive, such as, for example, the rubber base adhesive mass used in the manufacture of the conventional so-called surgical tape. The manner of spreading is unimportant and gaging of the spreading mass is not a problem because it is automatically taken care of in the ensuing step of the new process and product, namely, bythe application of a facing ply 7 to the spread surface. Facing ply '7 is or may be, as to its composition, the same material as the backing ply and for best results it is a relatively smooth surfaced unied sheet material such as paper, cellophane, or the like. Under preferred practice theplies are of like material because this minimizes the hazard of objectionable stiffness in the finished product.

Facing ply 7 is Iin some respects a grid in that it is provided at spaced intervals with holes or perforations 8. The orderly arrangement and spacing of the perforations may vary according to conditions and circumstances, but a spacing of say one eighth of an inch has satisfactorily fullled requirements. The imperforate areas provide for smooth gaging and masking of the major portion of the spread massvand the perforations make for controllable and spot or spaced presentation of active adhesive. y

The facing ply '7 may be superimposed upon the spread mass, for example, in the manner shown in Fig. 4, wherein'the spread or coated backing ply and the facingply in proper registry are led between pressure rolls 9. The effect of this is to insure a tape or plaster of uniformly smooth and symmetrical gage and to force active adhesive through the perforations of the facing or masking Industrial adhesive tape of high tensile strength and pliancy and capable of being rolled or` stacked without promiscuous sticking, comprising at least two unified sheets of cellulosic material with an intervening mass `of normally ta'cky adhesive bonding them` together into a unifiedand pliant tape-like body, one of said sheets being intact and impermeable to the adhesive mass and the other sheet having relatively small perfora tions in close order of arrangement to provide for controlled presentation of the adhesive.

FRANK I. BENNETT, JR. 

